C(6,5) * C(3,2)
this is read, 6 choose 5 times 3 choose 2
\(\binom{6}{5} \cdot \binom{3}{2} = \binom{6}{1} \cdot \binom{3}{1} = 6\cdot 3 = 18\)
Why are you asking us? What is wrong with all the calculators that you have access to?
I do not think that they are all broken. Last time I looked, the web2.0calc was working ok ://